メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.28995379173 43.1203394914542, 141.290884000689 43.1212039665418, 141.289552995543 43.1219142535405, 141.288180636193 43.1226392294821, 141.287194845716 43.1218243395722, 141.286151754066 43.1209613455509, 141.287686555092 43.1201250913639, 141.288996468819 43.1194547370225, 141.28995379173 43.1203394914542)) ^^http://www.opengis.net/ont/geosparql#wktLiteral